/*
   Copyright 2012 Michael Mastroianni, Amol Kapile (fastlsh.org)
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
   limitations under the License.
 */

package org.fastlsh.hash;

import java.util.Random;

public class HashFactory
{
	/**
	 * Makes an LSH family for cosine similarity.
	 * @param vecLen the dimension of the data vectors to be hashed
	 * @param familySize the number of hash functions to include in the family
	 * @return an array containing the functions comprising the family
	 */
    public static HashFunction [] makeProjectionHashFamily(int vecLen, int familySize)
    {
        HashFunction [] retval = new HashFunction[familySize];
        Random rand = new Random();
        for(int i =0; i < familySize; i++) retval[i] = new RandomProjection(vecLen, rand);
        return retval;
    }
}
